- Art Source International
 - Offers antique maps, prints, and medieval manuscripts. - Grial Books
- Offers unabridged facsimile editions of medieval and Renaissance manuscripts.
- Griffon's Medieval Manuscripts
- Features a catalogue of 12th to 16th century illuminated manuscript leafs.
- Mackus Company
- Specialises in the acquisition and sale of historical legal documents and illuminated manuscripts, including Book of Hours, and music and biblical leaves.
- manuscripta.com
- Specialises in royal correspondence and illuminated manuscripts, mostly of European origin.
 Marc Antoine du Ry
- Buys and sells illuminated manuscripts, medieval sculpture, and works of art.- Moleiro Editor, S.A.
- Offering facsimile editions of illuminated manuscripts.
- Sylvan Manuscripts
- Sales of antique property deeds, indentures, historical documents, illuminated manuscript leaves, and acts of parliament, medieval to pre-1900s.
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